Display Apparatus and Method of Controlling the Same

1. A display apparatus comprising: a plurality of display modules each including a display arranged in up and down directions, and configured to switch between a first state, the first state being a folded state and a second state, the second state being an unfolded state; a plurality of joining units including a hinge provided between the plurality of display modules and configured to join adjacent display modules; a driver comprising a wire supporting the plurality of display modules, the driver configured to drive the plurality of display modules to switch to the first state or the second state by adjusting a length of the wire; and a pair of coupling guides provided on lateral sides of the plurality of display modules and configured to guide the adjacent display modules to switch between the first state and the second state.

2. The display apparatus according to claim 1 , wherein the joining unit comprises a hinge configured to allow a pair of adjacent display modules to swing to each other.

3. The display apparatus according to claim 1 , wherein the pair of coupling guides each comprise a magnet, are respectively provided on opposite lateral sides of the adjacent display modules forming a pair, and are coupled to each other by the magnets in the second state.

4. The display apparatus according to claim 3 , wherein the magnet of at least one of the pair of coupling guides comprises an electromagnet, and the display apparatus further comprises a controller configured to control the electromagnet to be driven to attach the pair of coupling guides to each other when switching from the first state to the second state.

5. The display apparatus according to claim 4 , wherein the controller is configured to control the electromagnets to be driven to attach a plurality of the pairs of coupling guides in sequence from a top toward a bottom when switching from the first state to the second state.

6. The display apparatus according to claim 4 , wherein the controller is configured to control the electromagnet to be driven to detach the pair of coupling guides when switching from the second state to the first state.

7. The display apparatus according to claim 4 , wherein, the controller is configured to control the electromagnets to be driven to selectively attach or detach a plurality of pairs of corresponding coupling guides.

8. The display apparatus according to claim 7 , wherein the controller is configured to control the plurality of display modules to not display an image on display modules in the first state and to display an image on the display modules in the second state.

9. The display apparatus according to claim 8 , wherein the controller is configured to control an image to be displayed to be adjusted in at least one of a size or a position based on a usable screen region formed by the display modules in the second state.

10. The display apparatus according to claim 4 , further comprising a power supply, wherein the controller is configured to control the power supply to supply no power to the display module in the first state, and to supply power to the display module in the second state.

11. The display apparatus according to claim 10 , further comprising a sensor configured to identify whether each of the plurality of display modules is in the first state or the second state, wherein the controller is configured to control the power supply to supply power to the identified display module in the second state among the plurality of display modules, based on an identification of the sensor.

12. The display apparatus according to claim 1 , wherein the pair of coupling guides further respectively comprise a protruding portion, and a recessed portion accommodating the protruding portion in the second state.

13. The display apparatus according to claim 12 , wherein the recessed portion has a shape corresponding to the protruding portion and is configured to fix the protruding portion to the recessed portion when accommodated in the recessed portion in the second state.

14. The display apparatus according to claim 1 , further comprising a pair of first connectors respectively provided on opposite lateral sides of adjacent display modules, respectively provided with first signal lines providing power or an image signal, and configured to connect the first signal lines to each other in the second state and to disconnect the first signal lines in the first state.

15. The display apparatus according to claim 14 , further comprising a pair of second connectors provided opposite the pair of first connectors with the pair of coupling guides therebetween, respectively provided with second signal lines connected to the first signal line, and configured to connect the second signal lines to each other in the second state and to disconnect the second signal lines in the first state.

16. The display apparatus according to claim 15 , wherein the controller is configured to identify whether corresponding display modules are in the first state or the second state based on whether the first signal lines or the second signal lines are connected to each other.

17. The display apparatus according to claim 15 , wherein the pair of first connectors or the pair of second connectors are attached to each other based on attachment between the pair of coupling guides, so that the first signal lines or the second signal lines can be connected to each other.

18. A method of controlling a display apparatus comprising: a plurality of display modules arranged in up and down directions, and configured to switch between a first state, the first state being a folded state and a second state, the second state being an unfolded state; a plurality of joining units including a hinge provided between the plurality of display modules and configured to join adjacent display modules; a driver comprising a wire supporting the plurality of display modules, the driver configured to drive the plurality of display modules to switch to the first state or the second state by adjusting a length of the wire; and a pair of coupling guides provided on lateral sides of the plurality of display modules and configured to guide the adjacent display modules to switch between the first state and the second state, the method comprising: identifying that the display module switches from the first state to the second state; and controlling a pair of adjacent display modules of the plurality of display modules in the second state to be coupled by driving an electromagnet included in the pair of coupling guides so that the pair of coupling guides can be attached when switching to the second state to couple.

19. The method according to claim 18 , further comprising: identifying whether each of the plurality of display modules is in the first state or the second state; and controlling the display apparatus to supply no power to the display module in the first state among the plurality of display modules, and to supply power to the display module in the second state based on the identifying.

20. The method according to claim 19 , further comprising controlling the display module in the first state among the plurality of display modules to not display an image, and controlling the display module in the second state to display an image.